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products:sbc:common:applications:gpio:uart

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products:sbc:common:applications:gpio:uart [2023/11/07 05:09]
nick [Enable UART] 		products:sbc:common:applications:gpio:uart [2026/09/15 03:27] (current)
nick
Line 16: Line 16:
 ^  VIM1S    |  UART_C     |  15(RX)  |  GPIOD_3   |  uart_c            |  /dev/ttyS2   | ^  VIM1S    |  UART_C     |  15(RX)  |  GPIOD_3   |  uart_c            |  /dev/ttyS2   |
 | :::       | :::         |  16(TX)  |  GPIOD_2   | :::                | :::           | | :::       | :::         |  16(TX)  |  GPIOD_2   | :::                | :::           |
 +^  VIM-5    |  UART_AO_E  |  15(RX)  |  GPIOD_9   |  uart_ao_e         |  /dev/ttyS4   |
 +| :::       | :::         |  16(TX)  |  GPIOD_8   | :::                | :::           |
 ===== Enable UART ===== ===== Enable UART =====
 +
 +==== Linux ====
 +
  
 In order to use the UART, you need to enable the UART function via [[products:sbc:common:configurations:device-tree-overlay|Device Tree Overlay]]. In order to use the UART, you need to enable the UART function via [[products:sbc:common:configurations:device-tree-overlay|Device Tree Overlay]].
Line 42: Line 47:
  
  
-e.g. Enable ''UART_E'', you need to add ''uart_e'' to node ''fdt_overlays'' if it doesn't exist.+e.g. Enable ''UART_C'', you need to add ''uart3'' to node ''fdt_overlays'' if it doesn't exist.
  
 ```shell ```shell
-fdt_overlays=uart_e+fdt_overlays=uart3
  
 ``` ```
Line 52: Line 57:
  
 ```shell ```shell
-$ ls /dev/ttyS4 +$ ls /dev/ttyS3 
-/dev/ttyS4+/dev/ttyS3
 ``` ```
  
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-e.g. Enable ''UART_E'', you need to add ''uart_e'' to node ''fdt_overlays'' if it doesn't exist.+e.g. Enable ''UART_C'', you need to add ''uart3'' to node ''fdt_overlays'' if it doesn't exist.
  
 ```shell ```shell
-fdt_overlays=uart_e+fdt_overlays=uart3
  
 ``` ```
Line 71: Line 76:
  
 ```shell ```shell
-$ ls /dev/ttyS4 +$ ls /dev/ttyS3 
-/dev/ttyS4+/dev/ttyS3
 ``` ```
  
Line 112: Line 117:
 /dev/ttyS2 /dev/ttyS2
 ``` ```
 +
 +<tabbox VIM-5>
 +
 +Edit ''/boot/dtb/amlogic/kvim-5.dtb.overlay.env'' to add uart node to ''fdt_overlays'' node if it doesn't exist.
 +
 +
 +e.g. Enable ''UART_AO_E'', you need to add ''uart_ao_e'' to node ''fdt_overlays'' if it doesn't exist.
 +
 +```shell
 +fdt_overlays=uart_ao_e
 +
 +```
 +
 +After reboot, you will see the UART device node.
 +
 +```shell
 +$ ls /dev/ttyS4
 +/dev/ttyS4
 +```
 +
 +
 +</tabbox>
 +
 +
 +==== Android ====
 +
 +<tabbox VIM1S>
 +
 +''UART_C'' is enabled by default in ''kvim1s.dts'', The corresponding device node is ''/dev/ttyS2''.
 +
 +
 +<tabbox VIM4>
 +
 +''UART_E'' is enabled by default, the corresponding dev node is ''/dev/ttyS4''.
 +
 +<tabbox VIM3>
 +
 +''UART_C'' is enabled by default in ''kvim3.dts'', The corresponding device node is ''/dev/ttyS3''.
  
 </tabbox> </tabbox>
Last modified: 2023/11/07 05:09 by nick

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